The city desperately needs to revamp transportation infrastructure in Downtown Brooklyn following Barclays Center’s opening and recent neighborhood surges in new residents and transit ridership, a scathing report released yesterday charges.

The report – prepared by Tri-State Transportation Campaign in conjunction with various elected officials and civic groups — calls for sweeping transit changes throughout Northwest Brooklyn, particularly near the Nets’ new arena.

Some of the findings have long failed to garner enough political support, including tolling East River Bridges and providing residents near the arena with permit parking.

Among the new suggestions for the city’s Department of Transportation to consider implementing are increasing traffic enforcement and widening curbs near the arena, and creating 20 mph slow zones throughout Park Slope and Prospect Heights.

The plan is especially bicycle friendly, calling for bike-sharing stations and protected bike lanes along two of Brooklyn’s busiest stretches of roads. The proposed lanes would run on Flatbush Avenue from the Manhattan Bridge south to Prospect Park, and on Atlantic Avenue from Brooklyn Bridge Park by the riverfront west to Nostrand Avenue. Both lanes would intersect in front of the arena.

“Sandy showed us our transit system is our livelihood, so we need to make sure transit investment in this part of Brooklyn matches the high demand by developers to build here,” said Ryan Lynch, associate director of Tri-State Transportation Campaign.

A DOT spokesman said the agency would review the report and is “happy to work with this group on transportation improvements in the area.”